Roof Drains


There are a number of distinct types of roof water drains and cast iron roof drain in Anniston, AL and each is an unique answer to the wide range of roof types and their drainage issues. You should consider the type of roof, its size, and its roof pitch to be able to choose the right drain. You also may want to take into consideration the location of the drain, how much rainwater is anticipated and safe practices when selecting a roof water drain for a residence or business structure.

Gable, dormer, mansard and hip roofs shed rainwater water because of gravitational force. Flat roofs, on the other hand, collect rain water. Until the water is guided out and away from the roof , it will create pools that may inevitably leak and the accumulated weight will subsequently cause damage to the structure. That is the reason that roofs with a pitch of under two percent should have roof drains positioned at the lowest places on the roof where water pools and should be evenly spread throughout the roof top.

Kinds of Roof Drains


There are a number of distinct variations of roof drains. They generally fall into 2 groups: pitched roof drains and flat roof drains. Pitched roof rainwater drains normally comprise gutters which accumulate rainwater that passes via gravity to the roof edge. Gutters direct this water in the direction of downspouts which steer the water flow down and far away from the structure or in to sewers. Flat roof drains can be one of three primary types: scuppers, inner drains or siphonic drains.

Roof Drain Scuppers


Scuppers are situated on the roof's perimeter. Scuppers can also be placed on a balcony or terrace. Small holes are cut into the side of the roof structure so water can flow out and drain the roof top. Scuppers can hook up to a downspout, or could be lengthened to make sure that water is directed off of the building sides and foundation.

Interior Roof Drains


There are quite a few different types of inner drains for flat roofs. These are positioned at low spots on the roof and attach to interior drainage pipes that route water outdoors or in to a sewer system. Several designs of inner roof drains have domes, strainers or covers which prevent trash from blocking the roof drain pipe. These kinds of drains operate via gravitational force funneling pooling water through the roof drain system. They are made from PVC, cast iron or cast aluminum.

Siphonic Roof Drains

Siphonic roof drains are a more effective alternative to gravity drainage. Traditional flat roof drainage allows both air and water to enter the drain system producing pipe space which is occupied by both air and water. By incorporating an engineered baffle to the sump of the drain body it creates a siphonic drain which eliminates air from the system and permits smaller pipe diameters . When all of the air is removed, a negative air pressure in the tail portion of the drain is set up which pulls water off the roof siphonically. Though used primarily for flat roofs, siphonic drains can also be installed on angled roofs.

If you need more information about flat roof drain or cast iron roof drain in and around Anniston, Alabama, give us a call. We'd be glad to help.